A strange little side quest
If Tank 1944 sends you down a curiosity rabbit hole, start here. Games resembling checkers were being played thousands of years ago; evidence of related games reaches back to around 1600 BC. It also connects to a different milestone: Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. The screen is modern; the urge to test skill, pattern and timing definitely is not.